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CVE-2025-49709— Memory corruption in canvas surfaces

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 139.0.4之前版本存在安全漏洞，该漏洞源于画布操作可能导致内存损坏。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.66% · P50

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
Mozilla Firefox 139.0.4≤ * unaffected
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I. Basic Information for CVE-2025-49709

Vulnerability Information
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Vulnerability Title
Memory corruption in canvas surfaces
Source: CVE Program / CVE List V5
Vulnerability Description
Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 139.0.4之前版本存在安全漏洞，该漏洞源于画布操作可能导致内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 139.0.4 ~ * -

II. Public POCs for CVE-2025-49709

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III. Intelligence Information for CVE-2025-49709

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Same Patch Batch · Mozilla · 2025-06-11 · 4 CVEs total

CVE-2025-49710 Integer overflow in OrderedHashTable
CVE-2025-5986 Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// L
CVE-2025-5687 Local privilege escalation vulnerability in Mozilla VPN clients for macOS v2.27.0 and belo

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2025-49709

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